Fair-stitch machine.



No. 684,548. Patented Oct. [5, IBM.

, E. F. mnwen.

FAIR STITCH MACHINE.

' (Application. filed July 3, 1900.) (No Model.)

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No. 684,548. Patented Oct. l5, 190i.

E. F. MOWER.

FAIR STITCH MACHINE.

(Application filed July 3, 1900.) v (No Model.) 6 Sheets-Sheet 2.

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Patented Oct. [5, I901.

6 Sheets-Sheet 3.

E. F. MOWER. FAIR STITCH MACHINE.

(Application filed July 8, 1900.)

(No Model.)

TNE cams PETERS co, PHQYO-LIYHOU WASHINGTON. n. c.

Patented Oct. 15, I90l. E. F..MOWER.

FAIR STITCH MACHINE.

(Application filed Ju1y 3, 1900.)

6 Sheets-Sheet 4.

(No Model.)

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No. 684,548. Patented Oct. I5, I901.

E. F. MOWER.

FAIR STITCH MACHINE.

(Application filed July 8, 1900.) (No Model.) 6 Sheets-Sheet 5i.

m: mums PETERS co, mom-urns" wAsnmsToN. n. c

Patented 0ct.l5, I90l. E. F. MOWER.

FAIR STITCH MACHINE.

(Application filed July 3, 1900.)

(N 0 M 0 d e I 6 Sheets-Sheet 6,

.ZZZ W FT 14 P NTEIR .ZZ WTHEEIEEE- we noRms PEYENS co. moraurno UNITED STATES PATENT EDWIN F. MOWER, OF BOSTON, MASSACHUSETTS.

FAI R-STITCH MACHIN E.

SPEGIFICATION forming part of Letters Patent No. 684,548, dated October 15, 1901.

Application filed July 8,1900. Serial No. 22.439. (No model.) I

To aZZ whom it may concern.-

Be it known that I, EDWIN F. MOWER, of Boston, in the county Suffolk and State of Massachusetts, have invented a new and useful Improvement in Fair-Stitch Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to a peculiar mechanism for forming a stitch of a class that is usually termed the fair-stitch; and it consists in an arrangement of swinging and tilting parts that together actuate a loop-controller that traverses in such a manner as to effectually hold and control the movements of that part of the thread that forms the loop that is eventually drawn into the sole, where it constitutes that part of the stitch that serves to hold the sole in place when the stitch is com pleted.

My invention and the machine of which it forms a part are illustrated in the accompanying drawings, in which- Figure 1 is a view of my machine in side elevation, parts being shown in vertical section. Fig. 2 is a vertical longitudinal section of the machine, showing parts in elevation. Fig. 3 is a front elevation, parts being represented as cut away for the purpose of illustrating the construction. Fig. 4 is a plan, a part of casing cutaway. Fig. 5 is a plan showing details of lower mechanism. Figs. 6 to 12 are sketches to illustrate the method of forming the stitch. Figs. 13 and 14 are elevations showing the loop-controller and its connected parts.

In the drawings a complete fair-stitch machine is shown, but only for the purpose of illustrating more clearly the working of the parts in which my invention is involved.

The base of the machine is indicated by A and the front head by A. The main shaft B has upon it a hand-wheel B, rigidly connected, and a loosely-running belt-wheel B which has a friction-clutch connection at B with the hand -wheel B. The belt clutchwheel B slides freely on the shaft B, so as to be thrown into or out of connection with the clutch-bearings at B For moving the wheel B into clutch connection the following-described device is used, Fig. 2: A beveled wheel 13 is attached to the shaft B and a similar one B to the belt clutch-wheel B A double beveled wheel B is mounted on a vertically-moving rod 13 by an axle-pin B The rod B slides in the bracket-piece B and is operated by the bent lever B which is connected to it by a pivot-joint l3 and swings on a fulcrum-pin B on the arm A A link B serves to connect the bent lever B to an operating-treadle. (Not shown.) llt is obvious that by forcing the wheel B upward the belt clutch-wheel B will be thrown into working connection with the hand-wheel B, and thus start the machine.

The needle and awl bars are driven by the disk 0, Fig. 2, on the main shaft B. This disk 0 has two crank-pins mounted upon it in the usual mannerIof' the double-crank-pin disk. A pitman C connects one of the crankpins to the awl-bar D and the pitman 0 connects the other crank-pin to the needle-bar E. By the simple arrangement of two crankpins diametrically opposite upon the same disk for operating the needle E and awl D the time of the movement of said needle and awl is always correct-that is, one goes up when the other is going down.

A feed movement is given to the awl and needle by a mechanism that may be explained as follows: Both the needle and awl bars E and D are mounted in the swinging head N, Figs. 2 and 3. This swinging head is pivotally held at its upper end by the screw N and at its lower end by a screw N Fig. .2, which works in a slot made in the fixed head A, so that the lower end of it may swing back and forth, and thus give a feeding action to the awl and a corresponding movement to the needle. The feed motion is given to the swing-head N by the groove-cam F, Figs. 1 and 2. This cam operates a lever F pivoted on the fixed stud A, which communicates motion through an adjustable fulcrum F to rocker-arm F on the rocker-shaft F, Fig. 1. A second arm F on the said rocker-shaft is connected by a link F and pivot F to the lower end of the swinging head N and gives motion to the same.

The peculiarly novel part of this machine is in the loop-controller device, shown immediately under the work-supporting plate M. The loop-controller proper is indicated by H and has four motions-that is, a forthand-back motion nearly horizontally in the direction of the dotted arc 7c 70 and an up-and' down motion nearly Vertical in the direction of the dotted arc h h, Fig. 2. These motions are given to the loop-controller H by the eccentric H and cam K. (See Figs. 1 and 2.) The eccentric H works through the link H, pivot-pin H lever H H which swings on the fulcrum H link H, and pivot-joint H and loop-controller lever H which tilts on a moving fulcrum H and causes the loop-controller H to move toward or away in a vertical are from the stock W or in the general direction of the dotted arc h h. The other n1otions-namely, the nearly horizontal ones are imparted by the eccentric K, working through the link K, pivot-pin K lever K having a fulcrum at K link K pivoted at K and K and bell-crank lever K K having a fixed fulcrum at K and connected to the loopcontroller lever H at H The motion thus communicated causes the loop-controller H to move nearly horizontally in the direction of the dotted are 7:: 70.

In addition to the ordinary presser-foot P an additional laterally adjustable stitchholder G is used. It is attached to the presserfoot bar P by screws G G.

The method of forming the stitch is illustrated in Figs. 6 to12, inclusive. Figs. 6 and 7 show the starting positions. In Fig. 8 the thread is shown as carried by the needle E just through the stock W. For convenience in describing the formation of the stitch we assume that one has been made as illustrated in Fig. '7.

The needle in the first part of its upward motion will cause a loop to form, as shown in Fig. 9. Now the loop-controller H will take the loop, and as the needle goes upward the loop-controller will follow, but keep the thread taut. (See Fig. 10.) A continued upward movement of the needle and of the loop-controller H will bring the stitch to the condition shown in Fig. 11, the loop-retainer 11 being close up to the work. The loop-retainer is now withdrawn, and the thread is drawn taut, as shown in Fig. 12. The stitchholder G serves to hold the previously-formed stitch in place.

I claim- In a fair-stitch machine an awl and mechanism for operating the same; a needle having an eye in the point; means for operating said needle; a stitch-holder adapted to hold a stitch in place While the next one is being formed; means for operating said stitchholder; a loop-controller adapted to retain the loop while the needle is making its upward stroke and to follow the withdrawing thread, maintaining a steady tension until the fairstitch is formed, and mechanism for operating the same substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 13th day of June, A. D. 1900.

EDWIN F. MOWER. Witnesses:

FRANK G. PARKER, HARRY O. OLAPP. 

